Here is a collection of classic American science fiction from the Golden Age. A couple of hungry space vampires, fleeing the laws of the galaxy, arrive on its outskirts - our planet. Two corpses from which all the blood and vital energy have been sucked out cannot help but attract the attention of the planet, because crime has been completely eradicated... Long before the Flood, another race lived on Earth. And there was a war between this race and an intelligent cloud of thinking electrons. The electron creatures lost the war, and only a small part of them remained for many centuries in a safe shelter on the island... During the construction of the airfield, the shelter was opened and electrons moved into a powerful bulldozer. Their goal, like many centuries ago, is the same - to kill people! On the eve of the outbreak of the World War, Simon Ames created ten robots, each of which was provided with only one section of knowledge and walled up in concrete bunkers that could last for centuries. And now the time has come...Resembling giant butterflies, the aliens tried to establish mental contact with an earthling in order to get the arsenic they so needed...